Colorimetric analytical apparatus and use

Abstract

Improved calorimetric analysis technology based on the analysis of reaction gas, is disclosed. In accordance with the inventive apparatus, a gas permeable medium bearing a suitable calorimetric reagent, is positioned so that gas exiting the apparatus passes through the gas permeable medium.

1 . A calorimetric analytical apparatus comprising 
 a reaction vessel for gas-producing reactants,    a reaction vessel closure member provided with an outflow port,    an apertured member, and    a gas permeable carrier bearing a suitable calorimetric reagent,    wherein during an analysis, 
 said apparatus comprises an outflow pathway comprising said outflow port and an aperture of said apertured member, and  
 a portion of said carrier is sealingly positioned in said outflow pathway between said outflow port and said apertured member, by mechanical pressure exerted upon said carrier so that gas exiting through said outflow port and thereafter through said apertured member, passes through said portion of said carrier.  
   
     
     
         2 . The apparatus of  claim 1 , wherein the sealingly positioned portion of said carrier is in sealing contact with said outflow port.  
     
     
         3 . The apparatus of  claim 2 , wherein said sealingly positioned portion of said carrier is also in sealing contact with said apertured member.  
     
     
         4 . The apparatus of  claim 1 , wherein said apertured member assists in said carrier portion being sealingly positioned, and said carrier portion is releasably sealingly positioned.  
     
     
         5 . The apparatus of  claim 1 , wherein a raised bead disposed around said outflow port and that extends toward said carrier, assists in said carrier portion being sealingly positioned.  
     
     
         6 . The apparatus of  claim 1 , wherein a raised bead disposed around said aperture of said apertured member and that extends toward said carrier, assists in said carrier portion being sealingly positioned.  
     
     
         7 . The apparatus of  claim 1 , wherein said apertured member is a channeled member provided with an inflow aperture and a communicating outflow aperture.  
     
     
         8 . The apparatus of  claim 7 , wherein said carrier portion is sealingly positioned by said channeled member being disposed in a pressure-exerting position against said reaction vessel closure member.  
     
     
         9 . The apparatus of  claim 8 , wherein said reaction vessel closure member is a cap, and said channeled member is attached to said cap and locked in said pressure-exerting position.  
     
     
         10 . The apparatus of  claim 1 , wherein said apertured member is attached by a hinge to said reaction vessel closure member.  
     
     
         11 . The apparatus of  claim 1 , wherein said aperture is in direct fluid communication with the ambient atmosphere and provides for exit of the outflow gas from said analytical apparatus.  
     
     
         12 . The apparatus of  claim 1 , wherein a test strip comprises a support from an end of which an end of said carrier extends.  
     
     
         13 . A calorimetric analytical apparatus comprising 
 a reaction vessel for gas-producing reactants,    a reaction vessel cap provided with an outflow port,    a channeled member provided with an inflow aperture, and    a gas permeable carrier bearing a suitable colorimetric reagent,    wherein during an analysis, 
 said apparatus comprises an outflow pathway comprising said outflow port and said inflow aperture, and  
 a portion of said carrier is sealingly positioned in said outflow pathway between said outflow port and said inflow aperture, by mechanical pressure exerted upon said carrier so that gas exiting through said outflow port and into said channeled member via said inflow aperture, passes through said portion of said carrier.  
   
     
     
         14 . The apparatus of  claim 13 , wherein said channeled member assists in said carrier portion being sealingly positioned, and said carrier portion is releasably sealingly positioned.  
     
     
         15 . The apparatus of  claim 14 , wherein said channeled member is attached to said cap, and disposed in a pressure-exerting position against said cap.  
     
     
         16 . A calorimetric analytical apparatus comprising 
 a reaction vessel for gas-producing reactants, said reaction vessel being provided with an outflow port,    an apertured member attached by a hinge to said apparatus, and    a gas permeable carrier bearing a suitable calorimetric reagent,    wherein during an analysis, 
 said apparatus comprises an outflow pathway comprising said outflow port and an aperture of said apertured member, and  
 a portion of said carrier is sealingly positioned in said outflow pathway between said outflow port and said apertured member, by mechanical pressure exerted upon said carrier so that gas exiting through said outflow port and thereafter through said aperture of said apertured member, passes through said portion of said carrier, and  
 said apertured member assists in said portion of said carrier being sealingly positioned.  
   
     
     
         17 . The apparatus of  claim 16 , further comprising a reaction vessel cap provided with said outflow port, wherein said apertured member is attached to said cap and disposed in a pressure-exerting position against said cap.  
     
     
         18 . The apparatus of  claim 17 , wherein said carrier portion is releasably sealingly positioned.